Amand meeitte



A. MBBITTB. Door-Check.

Ne.224,94o.` Patented Feb.24,188o.

WW! y UNITED STATES AMAND MERITTE, OF ROUEN, FRANCE.

PATENT FFICE.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 224,940, dated February 24, 1880. Application led December 24, 1879.

To all whom it may concern: j j i Be it known that I, AMAND MERITTE, of the city of Rouen, in the Department of the `Seine Infrieure and Republic of France, have i the surface of and secured in the floor or ground at a point about midway of the doorframe or gateway, forming a permanent obstruction, which has been the cause of serious accidents.

The object of my invention is to provide a Y device so constructed that when the door or gate is open it shall leave no projecting obstacle or obstruction above the surface of the floor or ground in the way of persons passing in and out; and to that effect my invention consists in a movable stop, the upper f'ace of' which, when the door or gate is open, is flush with the surface of the ground, and is adapted to be projected above said surface, and locked into position when so projected, when the gate or door is closed, and caused to be automatically retracted within its housing when released to open the door or gate, substantially as hereinafter described, and shown in the accompanying drawings.

Figure l represents a plan view, and Fig. 2 a side elevation, of my improved door-stop, and Fig. 3 is a detail view.

Arepresents a metallic plate having asmooth or corrugated or roughened surface, as desired, or according to the location of the stop and its exposure to the weather. B is a treadle located in an opening, a, of the plate A, and pivoted between cheeks b, formed on the under side of said plate or attached thereto. The treadle B has a curved forward-projectin g arm, Bf, extending under the forward end of` c', to receive the lugs or trunnions c of the cylindrical follower E, which is so connected with the lever C that the lugs will rise freely within the segmental slots.

rIhe stop D, in its normal position., when the doors are opened, has its upper surface flush with the upper surface of the plate A, lyin'g in its opening af, and the follower E is in a like position within its opening a2 in said plate A when the door or gate is open, and said follower is guided in its movements in and out of the opening by guides a, formed on or attached to and projecting from the under side of the plate A around the openin g a2, and a3 is a stop-pin to limit the upward throw ofthe lever C and prevent the stop D from being cramped in its opening in the plate. i F is the door-section, or one of the leaves of' the door or gate, provided with the usual locking-boltf.

The operation is as follows: The leaf of the door carrying the lock being swung' closed until it has passed over the treadle B, the latfer is depressed by the foot, and the treadle-arm B', coming in contact with the outer end of the lever C, will raise the stop D upon that end sufficiently above the plate A to arrest the door and prevent its being swung too far out. AThe same movement of the treadle-arm will correspondingly retract the follower within its opening a2. lf now the bolt f is depressed upon the follower E the latter will correspondingly depress the end of' the lever upon which it rides and correspondingly elevate the opposite end, and with it the stop D, and the bolt, being of sufficient length, will fully projectv the stop D above the surface of the plate, and, with the usual construction of door-bolts, by giving the latter a half turn it will lock both the stop and the leaf of the door or gate in position. When the bolt is lwithdrawn the weight of the stop D will cause it to descend through the plate A until its upper surface is flush with the surface of said plate, and at the same time raise the follower to a like position. If the stop and follower are so constructed as to fit their openings snugly little or no `dirt or dust can get into the openings, and such as may settle between the surfaces of the stop and follower and those of the walls of the openings will be ejected whenever IOO the doors are closed, and in like manner may the treadle be constructed relatively to its opening.

The upper surface of the treadle is preferably rounded, so as to leave no abrupt projection above the surface of the plate, and projects just sufliciently so that when slightly depressed it will raise the stop a little above the face of the plate A.

The stop D may be made of any desired width to serve as an abutment for either one or the two leaves of the door or gate, and, if desired, two stops, D, and two followers, E, may be pivoted to the opposite ends of crossheads attached to or formed upon thelever C, one for each leaf' of the door or gate, and it will be evident that instead of employing the bolt of the door or gate leaf to depress the follower, elevate the stop, and lock the latter in position, any other suitable device may be employed to enable the mechanism to be employed for doors of varying thicknesses-as, for instance, a V or knee shaped bolt adapted to abut against a suitable stop on the door leaf, as shown in detached view, Fig. 3. In practice, however, I prefer to construct the plates and mechanism to correspond with the thickness of the door or gate in conjunction with which it is euiployed-thatis to say, I so construct the devices that the space from the aperture of the stop D to that of vthe follower E is equal to the thickness of the door, in order to bring the door-bolt on a line with the aperture of said follower, as will be readily understood.

The plate A and its mechanism is set ush with the floor or ground on a boxing of any desired construction, either of masonry, wood, or metal, and may be made fast thereto or simply laid thereon, as preferred.

Having now described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In a door-check, a movable locking or checking bolt having its upper face flush with that of its housing and the floor or ground, and devices whereby said bolt maybe elevated above the level of the door origrouud bymeans of the bolt on the door or gate when closed, whereby the latter -is rigidly locked against inward or outward movement, substantially as and for the purpose described.

2. The combination,with the plate A and the treadle and treadle-arm B B', of the lever C, the stop D, and follower E, substantially as described, for the purpose specified.

3. The combina-tion of the plate A, lever C, bolt D, and follower E with a folding door or gate and its locking-bolt f, substantially as described, for the purpose specified.

In witness that I claim the foregoing l have hereunto set my hand this 11th day of July, 1879.

A. MERITTE.

Witnesses:

RoUssELLE, JULEs EsELAN. 

